Evidently from вии (viji, “strong; powerful”), compare тонафтомс (tonaftoms). <span class="searchmatch">виияфтомс</span> • (vijijäftoms) (transitive) to breathe in (e.g., life; virility, etc...
From <span class="searchmatch">виияфтомс</span> (vijijäftoms, “to strengthen”) + -ма (-ma). виияфтома • (vijijäftoma) (uncountable) increase in strength or power V. I. Ščankina (2011)...